The plant was experiencing problems with the lifecycles of existing standard stainless steel tube in several of its heat exchangers, used to process untreated seawater as the cooling media.
In some cases the existing tube needed replacing after just two years. A new material was therefore required that would better withstand exposure to seawater with sewage load.
The plant gradually upgraded the quality of its tube and, in 2008, Sandvik SAF 2707 HD tubes were installed in two overhead heat exchangers.
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